17-year-old Lucky Blue, with his James Dean-meets-Brad Pitt face and ethereal white blonde hair is the biggest male model of the moment, attracting hundreds of female fans to wait outside whichever catwalk show he’s been booked to walk in.

18-year-old Pyper meanwhile, at 5ft 10", is a more 'petite' version of her 6ft 3" brother. One of the few people on earth to master the bleached hair/dark eyebrow movement, we've yet to see a bad picture of her.

But there’s more to the Smiths than brooding good looks; along with their equally photogenic siblings, Queen Starlie (christened Starlie Cheyenne), 21, and Daisy Celementine, 19, they are The Atomics, a surf-rock band. Lucky is the drummer and Pyper plays bass.

All four are represented by Next Models, and it's Pyper and Lucky that have really caught the imagination of casting agents. It’s not hard to see why; in their new campaign for Moncler captured by legendary photographer Annie Leibovitz, they look at home conveying fairytale twins in a plot inspired by Nordic sagas and traditional Russian and Slavic folklore.